Improvement in hoisting-machines



G. TIMPE. Hoisting-Mauhines.

Panama 1an. 13,1874'.

No. l46;492.

4 Smerp-sheet 2.

Hoisting-Ma-chines.

Patented]an.13,18l74.

AM. Film1( 17H0 GRAPHIC La M )Hassan/vs! Mams! Figs. 1 and 2.

'UNITED SrA'rEs GUSTAVUS C. TIMPE, OF NEW ORLEANS, LOUISIANA.

IMPROVEMENT IN HOISTING-MACHINES.

Specification forming part of Letters PatentNo. 146,492, dated January123, 1874; application filed August 2, 1873.

To all whom it may concern:

Be it known that I, GUsTAvUs C. TrMrn, of New Orleans, in the parish ofOrleans and State of Louisiana, have linvented certain Improvements inHoisting-Machines, of which the following is a specification: f

The object 'of my invention is to provide a mechanism forhoisting-machines, which will automatically stop bot-h the ascent anddescent of the car or platform at any desired point,

and thus prevent all danger resulting either from overwindin g or fromunchecked descending when the operator has lost control of the machineby the breaking of the check-lines. My invention consists mainly incombining with any ordinary hoisting-machine or elevator a revolvingspirally-threaded drum, or a screw, provided with shiftable stops, andacting through intermediate mechanism, so as to apply the brake at thedesired points'in the ascent and descent of the platform or car,suitable connection being also made with the slideva-lve, when thehoisting-machine is operated by a steam-engine direct, to shut oit'steam simultaneously with applying the brake.

Figure l is a side elevation of a hoistin g-m achine embodying `myimprovements. Fig. 2 is a plan view of the same. Figs. 3 and 3 aredetail views representing the mechanism intermediate between the screwor spirally threaded drum and the bra-ke and slide-valve. y Fig. 4 is anend elevation of the machine shown in Fig. 5 represents in detail thespirally-threaded drum or screw, its adjustable and shiftable stops, thesectoral or segmental ways, and the slide through which the system oflevers and connections controlling the brake and slide-valve isactuated. Figs. Gand 7 represent my invention applied to ahoisting-machine operated from aline of shafting.

The same letters off reference are used in all the g'ures in thedesignation of identical parts.`

In the example illustrated in the first five gures of the annexeddrawings, the main shaft A of the hoisting-machine is driven byfriction-pulleys C, C1, and C2, the latter of which is keyed to thedriving-shaft of a double cylinder steam-en gine. The idler-pulley C1turns in bearings which are automatically adjusted,

to preserve the contact of thepulleys with one another, by weighted armsor levers Gf. The main shaft A, carrying the hoisting-drum B and thebrake-wheel D, projects `through its bearing upon the side of thebrake-wheel, and carries on this overhunend adrum, E, the `surface ofwhich is threaded spirallyfrom end to end. This spirally-threaded drumacts upon the projection j', which enters between its threads, to movethe slide F back and forth, according as it revolves in one direction orthe other. This slide F moves in `horizontal ways of the plate F1, whichis arranged parallel to the surface of the drum to slide in a verticalarc in ways formed in` the side of the frame ofthe ange F 2 thereof. Thesliding plate Fl is linked to the short arm of the check-lever G, bymeans of the connecting-rod G1. The check-lever is fixed on the overhungend of the rock-shaft G2, which carries an` arm, H2, connected by therod H to one arm of the rocking beam H, which the machine. The rockingbeam carries" at each end, on a laterally-projectingstud, ananti-friction roller, h, upon which the arm I, which is secured at oneend to the `coupling D2 of the strap Dl of the brake-wheel, is.supported. The outer end of the arm I carries a friction-strap to thebrake-wheel with proper force, to stop the rotation of the main shaft ofthe hoisting-machine, when it is allowedto descend. y

'When the brake is applied, asshown in Figs. l and 3, the weighted arm Irests upon both ends of the rocking beam H, which then` asmental wayswhich sustain it. By turning the check-lever G up or` down, the weightedarm I is lifted by one end or the other of; the rocking beam H, wherebythe strap Dlis opened and the friction removed from the brake-wheel, sothat the machine may operate either to elevate or lower the car orplatform, as the case may be. i

The spirally-threaded drum E is` provided at each end with an adjustableand shiftable stop, E', which, as the slideF approaches either end ofmachine, and the outer side of the segmental turns on a stud projectingfrom vthe frame of weight, I', sufficiently ponderous toapply the sumesa nearly-horizontal position, and holds" the sliding plate F, throughthe intermediate ,p connections, in a central position in the segthedrum, strikes its projection f, and shifts the sliding plate It,together with its lateral slideF f, from its respective extreme positionat one end or the other of its ways to a central position,

s which will arrange the parts, as best seen in Fig. 3, applying thebrake by means of the weighted arm I, and stopping the machine. Thestops E consist of a clip, e, which embraces the outer thread of thedrum, and can be secured at any desired point of its circumference by aset-screw, el, and a slotted arm, c?, the inner end of which may have alip to hook into the channel between the threads, and which can beadjusted laterally on the clip across the face of the drum. By adjustingthis arm and shifting the entire stops, the means are provided forautomatically applying the brake after the main shaft and hoistin g-drumhave made the required number of revolutions to lift or lower the loadthe necessary distance. Both the spirally-threaded drum and theadjustable arms of the stops may be graduated to facilitate theiradjustment. The check-lever is controlled by the ordinary check rope orropes, by which the machine may be started and also stopped atintermediate points. The rock-shaft G2 is connected by .arms K2 and K1to a parallel rock-shaft, K, the arm K3 of which is pivoted to the lstemL1 of the slide-valve L, which controls suitable steam-ports and governsthe admission of steam to the cylinders in such a way that the enginesmay be reversed at will by suitably operating the check-lever G. Thevalve is so connected with the brake-mechanism that simultaneously withapplying the brake steam will be shut off.

In Figs. 6 and 7 I have shown' my invention as applied to a machinedriven from a line of shafting through a belt, M, and thespirally-threaded drum is carried on a counter-shaft, geared to the mainshaft of the hoisting-machine.

All the main features of my improvements, as heretofore described, areretained, and only slight modifications `in the arrangement ofthevarious parts are made, necessitated by the new conditions. Thedriving-belt is kept taut by the gravitating belt-tightener N, pivotedby means of arms N, to the driving shaft.

To guard against accidents which might result from the breaking of thebelt, I pivot arod, O, to the outer end of arm I, and arrange it tostand with its upper end directly under one of the arms of thebelt-tightener, so that,in case the belt breaks, the belt-tightener willbear down on this rod, and, pushing it downward, turn the arm I so as toapply the brake. The rod O should be supported by a suitable guide.

It is desirable to have the spirally-threaded drum or screw travel atthe surface as many feet in a given time as the surface of hoistingdrum,or, better still, a little faster. This iseasily accomplished by makingthis drum just a trifle larger 4in diameter than the hoistingdrum, whenboth are mounted on the same shaft; and where they are placed upondifferent shafts this relative surface speed may readily be obtained bygearing up or down,

as the case may be. The drums of hoisting` screw and intermediatemechanism to alitomatically apply the brake atany given point,substantially as specified.

2. The combination of the spirally-threaded drum or screw E, stops Ef,lateral slide F j', and sliding plate Ff, suitably connected to thebrake mechanism, substantially as and for the purpose specified.

3. The combination of the spirally-threaded drum or screw E, stops E',lateral slide F f, sliding plate F', rod Gl, check-lever G, rockshaftG2, arm H2, link H1, rocking-beam H. and weighted arm I I of thefriction-strap of the brake-wheel, substantially as and for the purposespecied.

4. The shiftable and adjustable stops E', composed of the clips e el andslotted arms e2, substantially as and for the purpose specified.

5. rlhe brake-Wheel of a hoisting-machine and reversing-valve of asteam-engine, in combination with a spirally-threaded drum or screw andintermediate mechanism to automatically both apply the brake and shutoft' steam at any given point in the revolutions of the hoisting-drum,substantially as speci- Jlied.

6. The combination of the belt-tightener N N rod O, and weighted arm I Iof the friction-strap ofthe brake-wheel, substantially as specified.

In testimony whereof Ihave hereunto signed my name this 2d day of July,1873, in presence of two subscribing Witnesses.

GUSTAVUS C. TIMPE.

Witnesses:

C. TIMPE, JOSEPH WALKER.

